Apparatus and method for preventing incorrect gear shifts in automatic transmissions of motor vehicles

isSOURCESOURCEminmaxTARGETTARGETTARGETSOURCETARGETTARGETA method for preventing incorrect gear shifts in automatic transmissions of motor vehicles comprising the following steps: determining a current output torque (M) of a source gear (G); generating a history of output torques by storing the curre...

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Bibliographic Details
Main Author Seufert, Martin
Format Patent
LanguageEnglish
Published 31.01.2012
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Summary:isSOURCESOURCEminmaxTARGETTARGETTARGETSOURCETARGETTARGETA method for preventing incorrect gear shifts in automatic transmissions of motor vehicles comprising the following steps: determining a current output torque (M) of a source gear (G); generating a history of output torques by storing the current output torque in the source gear (G) for a time interval having a predetermined duration; determining an absolute value of a minimal output torque (M) and an absolute value of a maximum output torque (M) from the history of output torques, comparing the two values and determining the greater absolute value; determining (S) an absolute value of a target torque (M) of a target gear (G), if an instruction for a gear change exists; comparing (S) the absolute value of the target torque (M) with the greater absolute value; and shifting (S) the transmission from the source gear (G) to the target gear (G), if the absolute value of the target torque (M) is less than or equal to the greater absolute value (FIG. ).